An issue facing shared read/write player hard disc drives (HDDs) is when a head-media contact event occurs, any resulting plume of debris caused by the contact event not only affects the magnetic disc currently being read or written, but other magnetic discs within the HDD enclosure. The presently disclosed technology is directed as mitigating the potential consequences of such a head-media contact event. By providing one or more internal access doors within the HDD, a magnetic disc currently being read from or written to may be physically isolated from other magnetic discs within the HDD. As a result, in the event of a head-media contact event, any resulting plume of debris caused by the contact event only affects the magnetic disc currently being read or written. The remaining magnetic discs within the HDD are isolated from the plume of debris.

The disc device that includes a disc tray which stores a plurality of stacked discs, a tray carrier which transports the disc tray, and a disc selector which supplies one disc of the plurality of discs stacked on the disc tray to a drive unit. The disc selector includes a disc selector spindle that supports the plurality of discs, a disc press on which an upper surface of an uppermost disc of the plurality of discs supported by the disc selector spindle abuts, a displacement amount detection mechanism that detects a displacement amount of the disc press displaced according to thicknesses of the plurality of supported discs, and a thickness detection unit that detects a thickness of each of the plurality of discs based on the detected displacement amount of the disc press.

The disc device that includes a disc tray which stores a plurality of stacked discs, a tray carrier which transports the disc tray, and a disc selector which supplies one disc of the plurality of discs stacked on the disc tray to a drive unit. The disc selector includes a disc selector spindle that supports the plurality of discs, a disc press on which an upper surface of an uppermost disc of the plurality of discs supported by the disc selector spindle abuts, a displacement amount detection mechanism that detects a displacement amount of the disc press displaced according to thicknesses of the plurality of supported discs, and a thickness detection unit that detects a thickness of each of the plurality of discs based on the detected displacement amount of the disc press.

A package includes a plurality of accommodation regions where a plurality of holders are accommodated in such a manner that the plurality of holders are able to be put in and out, and a partition structure that divides the plurality of accommodation regions. Each holder holds a plurality of magnetic tape cartridges in such a manner that the plurality of magnetic tape cartridges are able to be put in and out of the holder. In a state in which the holder is accommodated in the accommodation region, a height of the partition structure is higher than a height of the holder.

A package includes a plurality of accommodation regions where a plurality of holders are accommodated in such a manner that the plurality of holders are able to be put in and out, and a partition structure that divides the plurality of accommodation regions. Each holder holds a plurality of magnetic tape cartridges in such a manner that the plurality of magnetic tape cartridges are able to be put in and out of the holder. In a state in which the holder is accommodated in the accommodation region, a height of the partition structure is higher than a height of the holder.